Electric-lamp socket



s. P. WYRFEL ELECTRIC LAMP SOCKET Filed June 1925 2 Sheets-Sheet l llimuINVENTOR Samuel 1? h j I'FBZ inic ATTORNEYS Aug. 4, 1925. 1,548,696

s. P. WYRFEL ELECTRI C LAMP SOCKET Filed June 15" 1925 2 Sheets-SheetINVENTOR Samuel P. hf'y fel Mind MM his ATTORNEYS Patented Aug. 4, 1925.

UNiTED STATES PATENT CFFTCE.

SAMUEL P. WYRFEL, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE ARROW ELEC-TRIC COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

ELECTRIC-LAMP SOCKET.

Application filed June 15, 1923.

T 0 all whom e't may concern:

Be it known that I, SAMUEL P. VVYRFEL, a citizen of the United States ofAmerica, residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inElectricLamp Sockets, of which the following is a specification.

My invention relates to electric lamp sockets threaded to receive shadeholders, and more particularly to weatherproof shadeholding sockets.Among the advantages of my socket are its simplicity of construction andmanufacture and its superior weatherproof qualities.

In the drawings- Fig. 1 is an elevation of a socket embodying myinvention, a shadeholder and shade being shown applied thereto;

Fig. 2 is a bottom plan View of the socket with a shadeholder attachedbut without the shade;

Fig. 3 is an elevation partly broken away of the partly finished blankfrom which the shell of the socket is formed;

Fig. 4 is a perspective view of the finished socket shell; while Fig. 5is a sectional view on a larger scale, showing more clearly the mannerin which the shadeholder is securely held to the socket shell.

Fig. 6 is a view of a modification.

The ordinary method of attaching a shadeholder to a lamp socket by meansof threads or a head on the outside of the socket shell does not producea satisfactory waterproof joint between the shell and holder, with theresult that in the past metal weatherproof sockets have had theirshadeho-lders suspended from inside the open end of the socket or from acanopy covering the whole socket. My invention provides an efiective andwaterproof joint on the exterior of the socket shell and not onlyeliminates all special parts but is simple and economical tomanufacture. I accomplish this by the arrangement of threads and beadwhose formation on the socket shell I shall now describe.

In making the socket shell a large head 6 is first rolled out on thecup-shaped blank 7 near what is to be the lower end of the shell, intosomewhat the form shown in Fig. 3. The edges of this large rounded head6 are Serial No. 645,656.

then squeezed together and it is pressed into a downwardly overhanginghead 8 such as shown in Fig. 5. Threads 9 are formed on the shell ashort distance below the head by any desired method, the bottom 15 (Fig.3) cut out and the shell finished in the usual manner and assembled withthe rest of the socket 10.

A plain light one-piece shadeholder 11 can be used on my socket, and itshould have threads 12 on its central collar 13 to engage the threads 9on the shell. When the shadeholder is screwed onto the socket the downwardly overhanging head 8 first touches the sloping surface of theshadeholder at a point 14 a little distance from the central collar 13.If the shadeholder is screwed on a little further it tends to lock thethreads of the shell and collar together, and at the same time insure aclose fitting and watertight joint at 14. This wedging is assisted bythe resiliency of the shadeholder. It should also be noted that allexternal surfaces and the surface of the shadeholder under the bead willshed moisture readily.

I am aware that sockets have been heretofore known with external threadsand beads on their lower ends, but as far as I am aware this is thefirst socket combining the thread and head in which they cooperate toform a really waterproof joint. The formation of a downwardlyoverhanging hollow head from the shell itself is also novel.

It will be apparent that this invention may be applied to all sockets,whether metal or composition, weatherproof or interior.

Although my improved socket shell with downwardly overhanging head isespecially useful in connection with a shadeholder with sloping surfaceengaging the lower outer edge of the head as illustrated in Figs. 1 and5, it may be employed in connection with other constructions, such forinstance as the reflector or shade shown in Fig. 6 where an adapter orholder 15 is secured to a reflector or shade 1G and has its upper endthreaded at 17 to screw onto the outside of the threaded end 9 below thebead 8. By reason of the downward overhang of this bead 8 the rain cannot get to the joint.

What I claim is 1. A lamp socket shell having external threads on it,with a downwardly overhanging hollow bead above saidthreads, saidthreads and bead being adapted to form a weatherproof joint with ashadeholder.

2. A lamp socket shell having external threads on it, with a foldedflange forming a downwardly overhanging hollow bead above said threadsfor the purposes set forth.

3. A lamp socket shell having external threads on it, with a downwardlyoverhang' ing hollow bead above said threads, in combination with ashadeholder having a resilscribed. I p

4. A lamp socket shell having external ient sloping surfacesubstantially as d'ethreads on it, in combination with a down 7 wardlyoverhanging hollow bead above said threads, and a shadeholder adapted towedge on said threads and against said hollow bead. V

5. A lamp socket shell having external threads on it, in combinationwith a down wardly overhanging hollow bead above said external threadson its lower end adapted to receive a shade holder, the lower end ofsaid shell being bent inwardly below said threads for the purpose ofholding a p01- celain body, and a downwardly overhang ing hollow beadabove said threads in o01i1- bination with a one piece shade holder madeof resilient material adapted t'o'screw on the threads of said shell andto wedge against said bead and having an upwardly sloping surface undersaid head, substantially as described.

In testimony whereof I have signed my name to this specification.

' SAMUEL P. VVYRFEL.

